When Sergio went to dinner with his brother, the bill was $51.19. What was the total they paid if they left a 15% tip?

The total they paid was $58.8685

Step-by-step explanation:

Let us solve the question using the percentage method

∵ Sergio went to dinner with his brother

∵ The bill was $51.19

∵ They left a 15% tip

→ That means they pay extra money 15% of $51.19

∴ The total they paid = the bill + 15% of the bill

∵ 15% of the bill = 15% × 51.19

→ Change 15% to a decimal by divide it by 100

∴ 15% of the bill = × 51.19

∴ 15% of the bill = 0.15 × 51.19

∴ 15% of the bill = $7.6785

→ Substitute it in the total they paid

∵ The total they paid = 51.19 + 7.6785

∴ The total they paid = $58.8685

∴ The total they paid was $58.8685